I see there are many order tpyes: http://www.interactivebrokers.com/en/trading/orderTypesMatrix.php?ib_entity=llc#auction Actually how each order type works? I know the meaning of each order type. This is not what I'm asking. What I would like to know is how each order type works exactly when it is sent to the market, including the priority of execution, how they are processed/executed and so on. Is there any page or website which explains all these things? Thanks!